/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System;

using PriorityQueue = Lucene.Net.Util.PriorityQueue;

namespace Lucene.Net.Search
{
	
	sealed class PhraseQueue : PriorityQueue
	{
		internal PhraseQueue(int size)
		{
			Initialize(size);
		}
		
		public override bool LessThan(object o1, object o2)
		{
			PhrasePositions pp1 = (PhrasePositions) o1;
			PhrasePositions pp2 = (PhrasePositions) o2;
			if (pp1.doc == pp2.doc)
				if (pp1.position == pp2.position)
					// same doc and pp.position, so decide by actual term positions. 
					// rely on: pp.position == tp.position - offset. 
					return pp1.offset < pp2.offset;
				else
					return pp1.position < pp2.position;
			else
				return pp1.doc < pp2.doc;
		}
	}
}